A community was moved from an area where malaria was common to an island where there were no mosquitoes.
All the people had been taking the same antimalarial drug before the move. Some people stopped taking the drug on the day of the move. The others continued taking the drug for four weeks.
Health workers recorded new cases of malaria during the eight weeks after the move.
| Time when people stopped taking the drug | Number of people | Number of new cases of malaria |
|---|---|---|
| On the day of the move | 180 | 27 |
| Four weeks after the move | 320 | 16 |
Use the data and your knowledge of malaria to explain why the health workers should recommend taking the drug for four weeks after the move.
252 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.